Lubricating device



Sept 15, 1925.

fnven/orr Howard flroadwefl H. BROADWELL LUBRICATING DEVICE Filed 001;,5. 1922 by I Patented Sept. 15, 1925,

UNITED (STATES PATEN OFFICE.

HOWARD BROADWELL, OF NEW IYORK, 1\T. Y.,.ASSIG1\TOR T0 WESTERN ELECTRICCOM- PANY, INCORPORATED, OFNEW YORK,N. Y A CORPORATION OF NEW YORK.

LUBRICATING DEVICE.

number of bearingsniay be. quickly oiledwith a predetermined smallquantity of oil,

with only one filling of the oilchamber.

v To this end the invention comprises an oil gunhaving. a piston rodand-piston thereon, and .a member adapted to be manually tensioned andreleased to drive the piston rod a. predetermined distance forwardly inthe oil chamberto eject a small quantity of oil from the nozzleof thegun and into the bearing of the machine, forf each releasing operation.

More specifically, the gun comprises a cas: ing which encloses .athreaded piston rod fixed therein against rotation but capable oflongitudinal movement in the casing.

This movement is imparted to the piston rod by means of a ratchet wheelwhich is threaded thereon and fixed against longitudinal movement withrespect to thepiston rod. J

In setting the gun, tension is stored up in a spring-retracted drivingmember by rotating the same manually by means of a knob attached theretoand projecting outside the casing, which knob, in the presentembodiment, is rotated one revolution for each setting of the gun. Thisdriving member carries a pawl which during the rotation of the drivingmember rides idly over: the ratchet teeth, a holding pawl normallyengaging the teeth of the ratchet to maintain said driving memberadvanced as it is rotated. The nozzle of the gun is then inserted in thebearing to be lubricated and the holding pawl is thrown out ofengagement by pressure applied manually thereto, and the ratchet israpidly rotated one revolution on the threaded piston shaft which, sincethe shaft cannot rotate, is forced rapidly toward the nozzle a distanceof approximately one thread, the piston head act- Application filedOctober 3,1922. Serial No. 592,046.

ejecting notbe used to cause the oil to flow intothe ing on the oil inthe chamber to eject or squirt a small quantity of oil into the bearingwith considerable force.

. The oil gun of this invention is especially adapted for'oiling ballbearings which are in use and which areinacfcessible from above and mustbe oiled from beneath the bearings, the end of the nozzle being turnedat an angle to facilitate the oiling operation. In oiling bearings frombelow, gravity can hearing, but the oil'-must be squirted up withconsiderable force in order to lubricate the bearing effectively. I

'.Referring to the drawin'gs,Fig. 1 is a side elevation of the oil gun;"Fig. 2 is aside view partially in section; Figs. ,3, 4' and 5 aresectional views on lines- 3 3, 4'4, and 55, respectively, of F ig.;1.-

-R'eferring to the drawings, 1 designates a threaded piston rod orshaftwhich carriesa piston head 2' This piston head is fixed to theshaft' bymeans of'nuts 3. The oil chamber 4 is formed by a'cylinder 5 having anozzle 6 provided'with a small hole 7 through which the oil isejected'into the bearing to be lubricated; The shaft or piston rod 1 isfixed against rotary movement by a screw 8 (Fig. passing through thecylinder 5 and havlng an extenslon or tongue 9' (Figs-"2 and 3)projecting into a slot 10 (Fig. 2 running'the length of'the shaft. Y

the cylindrical member 5. Mountedto rotate upon theshaft'l is aninteriorly threaded ratchet wheel 14. This ratchet wheel is prevented atone end from moving longitudinally on the shaft 1 by the extension 9 ofscrew 8. At its other end, this ratchet wheel rides against a cylinder15 rotatably mounted on shaft 1. This cylinder or tube is surrounded bya spiral spring 16 having one end fixed to the U-shaped member 13 at 17and its other end fixed to the said cylinder at 34. A holding pawl 19(Fig. 4)

Screws 11 and'-'12 serve to hold a U-shaped member 13 rigidly connected.to

forming part of a spring pressed member 20 (Fig. 1) normally engages theteeth of the ratchet wheel 14. This member is fastened to the casing 21by screws 22, 23 in such a manner that when pressure is applied upwardlyas shown in Fig. 1 to member 20, the slots 24, 25 therein permit themember o move upwardly whereupon the p 19 is disengaged from the ratchetwheel. A small length of piano wire 26 is staked to the cylinder 15 atone end; and its other end is bent to lie between teeth of the ratchetwheel 14: to form a driving pawl. This Wireby abuttingv against aprojection, on a. screw. 28 extending through the member. 13 holds thecylinder or tube'l'5 in its normal position.

In operating the oil gun, the, knob, on:

thetension ofthe spring 16; to, rotate the:

ratchetwheel 14; by means of the; pawl! 26,

in a counter-clockwise directioni Inasmuch:

astheratohet wheel 14a cannot move longitudinally, the shaft l on-whichit is-threaded is forced to move, toward: thenozzle a distanceofisubstantially one thread: with such, rapidity that the-piston; head 2 onthe, end O l the shaft forces small quantity of the oil in the. chamber4; out. through the nozzle opening 7 and into the; part of: the

machinetmhea lubricated; The. gun is; similanlyf set, and released: foreach bearingto. be, oiled, a-ridg at; each, releasing; operation, the.piston rod rmoves toward the; nozzle a.

distance eqnalsubstantiallyto; one tlIIQEIClIOlI the piston I rod orshaft,

TQOJJGLOBJQ; the tool 'with oil the screw 8 is, first removedi and; the;threaded shaft L is backed. out, of; the-chamber: by turning the. shaftcounter-clockwise by meansof a pair ip-liensE applieidi to; the;flattened end:

33 0f h haft. The; screw, 8; is then: rev

placedanil the scnew-3Q,a nd the two washers.-

l h Q ZlBE end; of; thei tool" are; re.- ee ei-i I a Qhem enmar hbefilledi a maXimnm apaeit yzwi h i1- r the fielreelwher q ee lheasheraa 2 m screw 30 are then replaced and the tool is again ready foruse.

What is claimed is:

1 A lubricating tool comprising a cylinderhaving a nozzle, a threadedpiston rod projecting into said; cylinder, a; piston; head the-mea s ehold ng, the: against rotary movement, a ratchet wheel threaded thereonand held against longitudinal movement, a holding pawl normally engagingsaid-ratchet wheel, a: spring restored manually operable member having apawl cooperating with said. ratchet wheel, and means-t0 release saidholding-pawh A.- liquid ejecting: device comprising a casing having" anozzle, a threaded piston rod1'insaid; casing: fixed against rotation, apiston. head: thereon, an oil" chamber formed in said. casing, a rotaryelementthreaded thereon and fixed? against longitudinal movement,aliolding: pawl normally engagingi said element, a rotary: drivingmember, a spring for maintaining: the same innorma-l position, a handlefor: turning said member, a: pawl carried by saidmember I and adapted%tosengage said rotary: element: when Set, and;gmeansfor; releasingwsaidholding pawli i f 3 .,Aafliquidejectingi device comprising a cas ng;having; agnozzle a threaded shaft in sa d casingz haying-a pistonhead-and: a slot extending; lengthwise ofi said shaft, a fixedtonguez'engaging; said: slot, oil chamber formed; in; said casing, a"ratchet wheel threaded on Sflild'.Sll&fl3 and fixed against qlgitaudinalz movement; thereon, a holding pawl normally engaging:thesame, a-tubu lar element surrounding a part of' said'jsh'aft andcarrying; a. driving pawl adapted to ride idly, over saidifratchet wheelwhen said elementl is-rotated, and a: coiled-spring surroundingi said;tubular element for placing the; same: under. stress.

Iarwitness. whereof, I- hereunto subscribe myname:this:30th dayofSeptember A, D., 1922.

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